i got my new male betta one week ago today. he hasnt eaten once, from what i have seen, and as of thursday (4 days ago) he just floats at the top of the tank. the first time i saw him like that i thought he was dead because he doesnt move at all. ive tried two different brands of pellets, flakes, and also freeze dried worms and nothing seems to work. i had a female betta once before and she would only eat the dried worms so i thought he was the same but he wont eat them at all.

I'm with javi here. Insufficient temps and/or water quality are my top two suspects for lack of appetite and lethargy.

well NOT always ( well not with recently purchased bettas ). Sometimes when bettas are brought home, they sometimes do no eat for days and days from all the moving stress and what not. I had a guy that did not eat for exactly a week after i bought him and then he ate like no tomorrow! So, if that persons water params are all good, then it could be just stress from the big move.

Water quality / temperature / stress seems about right. There's always what I call "new tank syndrome." Just simply moving into a new home, although this can be possibly linked with stress. With a new betta, it's harder to tell if he's stressed or still simply not used to it (my opinion).

But yes, what's the tank temperature, and how often do you clean. ANd when was the last time you cleaned it. And what size is the tank?